Patents by Inventor Truong V. Nguyen

Truong V. Nguyen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Constant current and constant voltage regulating circuit for common-gate or common-base transistor devices
    Patent number: 5298869
    Abstract: A circuit for maintaining a constant voltage across and constant current through an RF cavity includes a RF cavity comprising a common-gate or common-base transistor associated with a current control circuit maintains a constant current flowing through the RF cavity. The current control circuit has a current control BJT associated with the RF cavity and a resistor between the emitter of the current control BJT and the negative source voltage of the RF cavity. The current control BJT and resistor operate as a current source or sink as necessary to maintain a constant current flow through said RF cavity. A constant voltage regulation portion of the circuit maintains a constant voltage across the RF cavity and includes a zener reference diode and a voltage regulation BJT.
    Type: Grant
    Filed: October 22, 1992
    Date of Patent: March 29, 1994
    Assignee: Alcatel Network Systems, Inc.
    Inventors: Leon Jinich, Truong V. Nguyen, R. Daniel Balusek